Earlier quoted context omitted.
They built the page with Bootstrap. Almost all the CSS classes are provided by it. What's wrong with that?
I wasn't suggesting anything's wrong with it. Certainly the creator of Bootstrap has liberty to copy himself. I guess I'm just a little surprised he didn't want to showcase his variety.
The purple space background was designed by an illustrator here at GitHub and I just put it to use. That the page ended up being purple and blue like Bootstrap is kind of just a coincidence. Previously the Enterprise site's background was a custom-made OS X ish space background—lots of blue and gold.
Beyond that I don't see a huge concern of the two looking similar. Bootstrap 3's homepage will be massively different from v2s today if it helps though.